Civil Engineering Reference
In-Depth Information
FIGURE 4-12
Rayleigh distributions of hours and energy per year versus wind speed with c = 10 and k = 2.
FIGURE 4-13
Rayleigh distributions of hours and energy per year versus wind speed with c = 15 and k = 1. 5.
The energy distribution function has the mode at 28.5 mph. That is, the most
energy is captured at 28.5 mph wind speed, although the probability of wind
blowing at that speed is low.
The comparison of
Figures 4-12
and
4-13
shows that as the shape param-
eter value decreases from 2.0 to 1.5, the speed and the energy modes move
farther apart. On the other hand, as the speed distribution approaches the
bell shape for k > 3, the speed and the energy modes get closer to each other.
